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Life History Patterns and the Comparative Social Ecology of Carnivores

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Life History Patterns and the Comparative Social Ecology of Carnivores WellBeing International WBI Studies Repository 11-1984 Life History Patterns and the Comparative Social Ecology of Carnivores Marc Bekoff University of Colorado Thomas J. Daniels University of Colorado John L. Gittleman Smithsonian Institution Follow this and additional works at: https://www.wellbeingintlstudiesrepository.org/acwp_ena Part of the Animal Studies Commons, Behavior and Ethology Commons, and the Comparative Psychology Commons Recommended Citation Bekoff, M., Daniels, T. J., & Gittleman, J. L. (1984). Life history patterns and the comparative social ecology of carnivores. Annual review of ecology and systematics, 15, 191-232. This material is brought to you for free and open access by WellBeing International. It has been accepted for inclusion by an authorized administrator of the WBI Studies Repository. For more information, please contact [email protected]. Life History Patterns and the Comparative Social Ecology of Carnivores Marc Bekoff1, Thomas J. Daniels1, John L. Gittleman2 1 University of Colorado 2 Smithsonian Institution INTRODUCTION The mammalian order Carnivora is characterized by a great range of behavior- al, ecological, and morphological adaptations, as well as substantial intraspecific variability (i.e. behavioral scaling; see 324). For example, in wolves (see Table 1 for scientific names), body size ranges from 31 to 78 kg, litter size varies from 1 to 11, home-range size differs 50-100 fold, populations are found in every vegetational zone except tropical forests and arid deserts, and individuals may live alone, in pairs, or in large packs (124, 204, 332). Despite such widespread variation, comparative analyses indicate that there also is remarkable consistency (86, 105) in the ways many diverse carnivores adapt to their habitats. Therefore, it is possible to highlight trends in the phylogeny of behavior and life history characteristics by drawing on data from numerous disciplines, including anatomy, physiology, taxonomy, behavior, and ecology (16, 54, 83, 84, 92, 93, 97, 128, 191, 196, 199, 242, 243, 313, 331). Due to space limitations, we will primarily review field studies focusing on the variation in behavior, body size, and life histories and emphasize data collected on identified individuals that have been observed directly (sometimes supplemented by radio-tracking) over long periods of time. Such studies are limited in number and comparative breadth, so information from shorter field studies and data on captive animals will also be used as a supplement. Comparisons of artificially and nonartificially fed groups must be treated carefully, however, since food resources have strong direct effects on social behavior (263). In addition, comparisons of exploited and (relatively) unexploited populations must take the food source into account (156). Finally, we will briefly discuss some practical aspects of data collection and analysis. Our approach is pluralistic in two respects. First, rather than focusing on either intraspecific or interspecific variation, we emphasize the reciprocal exchange of information between both levels of analysis. Comparative studies generate hypotheses that often can only be verified in single-species studies, and the generality of functional explanations of a species' trait rests with comparative analyses among related taxa. Second, because confounding variables involving size constraints and phylogenetic effects are frequently associated with behavioral and ecological diversity (62, 64, 112, 113a), we include allometric and phylogenetic trends in our discussion of carnivore behavioral ecology. Both descriptive studies and field experiments are still sorely needed for most carnivores. Textbooks, reviews, and popular articles frequently exaggerate our knowledge of certain phenomena (71). As Dunbar (75) stressed, long-term field studies must be performed if we are ever to learn about the evolution of the behavior and social ecology of long-lived "higher" species, in which intraspecific variation is so obvious. Table 1. Scientific and common names of Carnivores referred to in the text. Family Family Genus and species Common name Genus and species Common name Canidae Viverridae Dusicyon culpaeus South American fox (culpeo) Helogale parvula Dwarf mongoose Dusicyon griseus Chico gray fox Suricata suricatta Meerkat Fennecus zerda Fennec fox Hemigalus derbyanus Banded palm civet Lycaon pictus African wild dog lchneumia albicauda White-tailed mongoose Otocyon megalotis Bat-eared fox Mungos mungo Banded mongoose Alopex lagopus Arctic fox Nandinia binotata Palm civet Canis lupus Wolf Osbornictus piscivorous Fishing genet Canis latrans Coyote Genetta genetta Common genet Canis aureus Golden jackal Fossa fossa Fanaloka Canis mesomelas Black-backed (silverbacked) jackal Nyctereutes procvonoides Raccoon dog Hyaenidae Vulpes vulpes Red fox Hyaena hyaena Striped hyena Cuon alpinus Dhole or red dog Hyaena brunnea Brown hyena Cerdocyon thous Crab-eating fox Crocuta crocuta Spotted hyena Speolhos venaticus Bush dog Proteles cristatus Aardwolf Chrysocyon brachyurus Maned wolf Felidae Procyonidae Herpailurus jagouaroundi Jaguarondi Procyon lotor Raccoon Leopardus geoffroyi Geoffroy's cat Nasua narica Coati Puma concolor Mountain lion or cougar Felis margarita Sand cat Ursidae Prionailurus bengalensis Bengal cat Ursus americanus Black bear Panthera leo African lion Thalarctos maritimus Polar bear Panthera tigris Tiger Helarctos malavanus Malayan sun bear Panthera pardus Leopard Panthera onca Jaguar Ailuridae Acinonyx jubatus Cheetah Ailurus fulgens Red panda Leopardus pardalis Ocelot Lynx canadensis Lynx Ailuropodidae Lynx rufus Bobcat Ailuropoda melanoleuca Giant panda Caracal caracal Caracal Mustelidae Mustela nivalis Least weasel Mustela erminea Stoat or ermine Mustela vison American mink Mustela frenata Long-tailed weasel Metes metes European badger Lutra lutra European otter Enhydra lutris Sea otter Martes americana American marten Martes pennanti Fisher Gulo gulo Wolverine Mephitis mephitis Striped skunk GENERAL CHARACTERISTICS OF CARNIVORA Broadly speaking, members of the order Carnivora are distinguished from other mammals by their carnassial dentition and the high proportion of vertebrates their diets (Carnivora is derived from the Latin caro: carnis meaning "flesh" and voro, "to devour"). As in other mammalian orders, however, there are many interesting exceptions to these general characteristics. For example, the white-tailed mongoose and the bat-eared fox are insectivorous; the red panda and the giant panda feed primarily on bamboo; and the black bear maintains itself on a catholic herbivorous/frugivorous diet. Besides their dentition and diet, carnivores' other pronounced traits (93, 140, 242, 243, 271) include: (a) a jaw joint that is a transverse hinge, which facilitates biting and cutting but does not permit grinding action by the teeth; (b) a vertebral column that is strong and flexible and a long tail; (c) a brain that is relatively large, particularly in comparison to herbivores and insectivores; (d) anal and forehead scent glands that are well-developed and are used in marking, social recognition, and defense; (e) a walking gait that ranges from plantigrade to digitigrade; and (f) in most species, soft fur covered by longer guard hairs. The order Carnivora is divided into two superfamilies, Canoidea and Feloidea, and seven polytypic families-Canidae, Ursidae, Procyonidae, Mustelidae, Viverridae, Hyaenidae, and Felidae. Although there is continuing controversy, growing evidence suggests that the red panda and giant panda belong in two monotypic families, Ailuridae and Ailuropodidae, respectively, rather than in the Procyonidae or Ursidae, as was previously thought (83, 251). CANIDAE The Canidae, with 36 species divided among 16 genera, is composed of small- to medium- sized carnivores (1-60 kg) distinguished by their cursorial mobility and strong jaws and cheek muscles (60, 226, 227, 285). Canids live in a wide variety of habitats. More behavioral and ecological information is available for Canidae than for any other carnivore family because they are typically diurnal and include an unusually large number of group-living species (4, 16, 24, 97, 105, 124, 157, 159, 191, 204, 331, 332). In many of these species, both parents provision and protect their young (158). Much of our discussion below centers on patterns in the Canidae. PROCYONIDAE Closely related to Canidae is Procyonidae, which includes 18 species in 6 genera. Procyonids are comparatively small carnivores (0.8-12 kg) confined to the New World, and all are semiarboreal, prefer temperate and tropical vegetational zones (144), and have a plantigrade gait. Most of them are solitary, although raccoons are frequently seen in extended family groups (102; Seidensticker, personal communication) and coatis live in female-banded groups with as many as 10 adults (143, 266, 267). AILURIDAE AND AILUROPODIDAE Both red pandas and giant pandas (placed in Ailuridae and Ailuropodidae, respectively) are from central Chinese provinces; red pandas also occur in Nepal, Sikkim, and northern Burma. These two species feed primarily on bamboo and are solitary except during the breeding season (155, 251). URSIDAE The family Ursidae (bears) consists of 7 species divided among 6 genera, which (with the exception of the Malayan sun bear) inhabit the Northern Hemisphere and northern South America. Their dentition reflects a shift away from carnivory toward herbivory: The anterior premolars are small and the carnassials are nonsectorial
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